import java.util.Scanner;

public class work3211 {
    public static void main(String[]args){
        Scanner sc =new Scanner(System.in);
        System.out.println("请输入年份：");
        int year = sc.nextInt();
        if(year>=0){
            if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
                System.out.println(year+"年是闰年");
            }else{
                System.out.println(year+"年不是闰年");
            }
            }else{
                System.out.println("输入错误");
        }
    }
}

